Pump



March 30 1926.

P. DISERENS PUMP Fild Oct. 29, 1924 IN VENTOR Patented Mar. 30, I926.

UNITED STATES PATENT OFFICE.

PAUL DISERENS, OF NEW YORK, N. Y., .ASSIGNOR TO WORTHINGTON PUMP &MACHIN- -EBY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

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Application filed October 29, 1924. .Serial No. 746,469;

To all whom it may concern:

Be it known that I, PAUL DIS'IQRENS, a citizen of the UnitedStates,residing at New York city, county of Kings, and State of New York, haveinvented certamnew and useful Improvements in Pumps, fully described andrepresented in the following specification and the accompanyingdrawings, forming a part of the same.

This invention relates to improvements in pumps.

The invention aims especially to provide a simple, cheap and durablehigh pressure pump which may be used with advantage in handling hotliquids, such, for example, as are encountered inthe production ofgasoline from heavier petroleum products in modern cracking processes.Briefly stated, the present pump comprises a novel arrangement forpreventing the working parts of the pump, with the exception of thevalve service, from contact with hot liquid, with efficient means forprotecting the plunger rod stuffing box packing and cooling that part ofthe plunger rod 'which on the outstrokes is exposed to the atmosphere,thereby greatly prolonging the continuous operation of the pump andavoiding danger of fire caused by flashing of the oil adhering to theplunger rod.

For a full understanding of the invention, a detailed description of aconstruction embodying the invention in a preferred form will now begiven in connection with the accompanying drawings forming a part ofthis specification, and the features forming the invention then bespecificially pointed out in the claims.

In the drawings- Figure 1 is a side elevation of the improved pump, and

Figure 2 is an end elevation, partly 1n section, looking toward the leftin Fig. 1.

Referringenow to the drawings, the pump shown by way of illustration isof the triplex type, comprising a battery of three pumps A mounted inany suitable manner in a frame-work B. The piston. rods 10 are operatedthrough suitable cross-heads(not shown) and crank rods 11 secured toshaft 12, the cranks being set at 120 with respect to each other asusual in pumps of this type. The shaft 12 is actuated by a gear wheel 13driven by pinion 14 mounted on shaft 15 extending through the frame,suchshaft be ing driven in any suitable manner, or as shown by abelt-driven pulley 16 of'the usual fast and loose type.

Referring now to Fig. 2, it will be noted that each of the pumps A. issingle-acting and comprises a cylinder 1, suction valve 2, dischargevalve 3, and a pulsation chamber connecting these elements. The valvebodies preferably and as shown are of the ball type, with the usualguards or cages-to prevent v displacement. In order that the pump may beeflicient under the high pressures incident to use in modern oilcracking processes, it is preferable that .a solid metal pump body ofthe usual well-known type be used, as in this type of pump the plungerbores, pulsation chamber, valve bores, and the suction and dischargechamber and passage are all formed in a single block of forged steel.

In order that the piston rods 10 of the triplex pump shown, and thestuffing boxes for such rods, may be effectively cooled and protectedfrom contact with the hot liquid being pumped,- each pump bore 1 is madeof such length as to provide a substantial clearance on what hasheretofore been known as the dead side of the plunger. These clearances,for the purposes of the present description, will be termed surgechambers, indicated at 6, and, as shown, connected by pipes 7, to thedischarge line at any desired point. Preferably, the connection to thecylinder bores is by 'way of annular chambers 8 surrounding the packingfor the plunger rods in such stuffing boxes, which latter are otherwiseof usual construction and mounted in the cylinder heads 9. It will beseen that make-up liquid will be supplied from the discharge line 18through pipes'7 to the surge chambers 6. While the pipes 7 may beconnectedto either the suction or discharge side of the pump, preferablyand as shown such pipes are connected by a single conduit which istapped into the discharge line 18, and this connection preferably willbe made in the discharge line at a point sufficiently distant from thepumping elements to maintain cool liquid in the surge chambers andprevent injury to the scribed, providing only for the supply of make-upliquid to maintain thebody of liquid in the surge system under disdiargepressure. While a pump of the general type shown is preferable, in thatn it secures the desiredsurging action between the surge chambersabovedescribed, itwill be understood that asingle pump eylinderinay beused, in which I case the surgingaction of the liquid would .be from asurge eha mber on thedead side-of the plunger through the connectionthereto to the discharge line or other suitahlejpoint.

In either of the above m-rangements', however, it is preferable toemploy a cooler of any sultableor well-known type. which may be locatedeither in the .surgeclmmbers, or,

as shown at 19, positioned on the. pipes 7,

the cooling medium being supplied to the coolers at 20 and discharged at21.

From the foregoing it will be seen that not only will the stuliing boxpacking of the pumps be rotected'fromcontact with the hot liquid eingpumped, but the parts of. the plunger rods which-are exposed to theatmosphere on the outstrokes of the plunger rods will be. cooled, sothat dangerof-the oil adhering thereto flashing on. contact 'wit-h theatmosphere and causing fire is avoided. It will be noted further thatwith a construction like that shown and described, the

liquid in the surge chambers above the,

plungers and the suction pressure in the pulsation chambers, so that ifany leakage does occur during this part'of thecycleit will be only thecool liquid from the surge chambers, and this, of course, will pass intothe hot pulsation chambers.

It will be understood that various changes may be made in theconstruction and arrangement of parts shown and described, while stillretaming theinvention defined by the claims. 1

What is claimed is:

1. pump for hot liquids, comprising a plunger bore, a single-actingplunger arranged to work in said bore and actuating means-forsaidplunger, a surge chamber on the, dead side of the plunger, and aconnection'to the pump arranged to maintain cool-liquid in said chamber.1 5

2, A pump for hot liquids, comprising a plunger bore, a single-actingplunger arranged to work in said bore and actuating means for saidplunger, a surge chamber on the dead side of the plunger, a connectionto the pump arranged to maintain liquid in said Chandler, and means 'forcooling the liquid supplied tosaid chamber.

- A. pump for hot liquids, comprising a plunger bore, a single-actingplunger arranged to work in said vbore and actuating means for saidplunger, a surge chamber on the dead side of the plunger, and aconnection to the discharge line of the pump arranged to maintain coolliqu chamber. 4. A pump for hot liquids, comprising a ranged to Work in'saidbore and actuating means for said plunger, a surge chamber betweenthe plunger rodxstufling box and 'the-dead side of the plunger, a'connection between the discharge line of the pump and said chamberarranged to supply liquid to".

the latter, and means for cooling the liquid suppl ed to said chamber. if

5. A pump for hot liquids, comprising a plunger bore, a single-actingplunger ar-- ranged to work in said bore and actuating id in said meansfor said plunger, asurge chamber on the dead side of the plungeigfaconnection arranged to supply liquid from they pump to .said chamber,and a'cooler on said connection. p In testimony whereof, I have hereuntoset my hand.

PAULDISERENS.

